Depends on node package but most offer a clone to new drive for the data drive. MyNodeBTC makes this easy. Last time I did for raspibolt I just did an rsync. A lot of people will need to plan an upgrade over the next 18 months so good to raise awareness of this

Are you able r.i.p connect to your private electrum server, because, i can NOT for days now. The message i got is socket closed. Do you or anyone have idea what to do?? #[0]

use storage that can add additional disks and expanding filesystems like zfs, btrfs, lvm